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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25d4732ee0c3fbd401e63c44a6db193ea8386d6e11b68f1ec06331f9d74156db' 
  AND token = 'H36oTLIaICZRTT65J3RydvtxrGA44dTFr5YC9R4X6FE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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