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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05434472e835de68794df1c02a54c7c7f777b4fba8dfb00f9fc804b89bd05db9' 
  AND token = 'l8GY8Rgc8ZkJ0JR3vuBuf42gMnnxCaN7pIJO45pQKAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}