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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd23e84d4b51c201d75f0b2bbcef7acd0c10b8dbfe2e321abe75f8aea97ae4d31' 
  AND token = 'Lqap0/viwsDRpisHS/YpftpoO8IvL2xvTojWkAsBr3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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