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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7253570377f98cd3c6fa6805c2489c9b22ea1b27cd0a406d5d508bb8b0cc54f4' 
  AND token = 'IM7J7Trc99U8cDEGmCcmZezNbTdp4ugDpcQtR+4pQ+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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