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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c2ec07acae88ee1749467f5c8d37f1782d7168dda5565822c414d06015ab9ae' 
  AND token = '0t8XvodzrAmf95eq6YSCPgLT3gUDqygclYdpRSGyOXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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