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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd85f5380c2b2d17b39df74b1ab93b5c2aae22a84fdbfaeed2227570780d548f3' 
  AND token = 'PAbmEsxmBNwQD6nlLc8EUlKCGbiXfuG5p9gBJebTYnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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