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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbed596b6ce3eb6fbff9039e0d8d695f6a49bfe803ed53c0be3e17c5c365aaa7' 
  AND token = 'VQd2JdPwk6mVmcWroxcmJxT3/xPFJ9Iw9AAiBO+h8aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00131

JSON explain

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