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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2e12fe2ad55ef5466c5f8b6095bcead8fa8c1bb49c3e93948fc57d28c7dbd0a' 
  AND token = 'jhgJabyiXUtqpaIDGDURqamF0v4o9dZJ9U4LXda3h2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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