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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95a204884a682212bc507a81e4d7dc83840e99f6c0edaed2d01c92285dc284cf' 
  AND token = '4oBo/8Ecl1UbipL2qH7aDJgFt5TL5lFutpPKNQETjDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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