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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0facc195202b364114ce298c4f4311b5ecef756c50eb6fa8f69a796b42cd8367' 
  AND token = 'FbcRZA6ZXU27u9CTnd9CUFzAKwNncs2Y7u15XqnDbIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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