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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '711f1afca92795d05b513a5aff998b04f980a400b42b39968b2c76becb300d52' 
  AND token = '0lEUVSqBKL1ubZ8atX2jT75Q1zqKJrk6+yrleEX5i5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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