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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bee0af13757ce516efff8da2db1fe9701b217068b0997c9fc426152a0aed50b' 
  AND token = '1sV/PNAZLUVa2Npz/2MzGZDEMyjkoVSxzipUk4fPB7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.06135

JSON explain

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