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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9ef9f39862ea7664a4ab8919c0b0001ba3f8aa339ac8cc5888bfe6e43a75426' 
  AND token = '8vSMb2rVyENT8yfvSY2mfd9Te93h/1R4jXor77TILEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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