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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '711e4340ff017a656090158ba6cc6814f2a52ab838a2cd5ce477bbe576c305aa' 
  AND token = 'ZptqOhacCVsdchf5z48PDeFatHZzHv1cZOrc+UCEfnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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