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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a41b9d70e35159ad7c6c80d22cfb55050c136d65b827188a1527c189088fdbc' 
  AND token = 'tVWSwL2CG7aPMfs8XezX22WXEvdcon3WO0jd1A1RjxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}