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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b60be1a4e1a8b32ec2a32c70464212ad45ee0264f499b23355a39c2f125f08be' 
  AND token = 'ClCmwor49PC3CnQgsw5FgR4nlxyIyY3Js9ODr/kyT68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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