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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d531a5c57f8ceeea4dc76a1d82268ac5eceb184b282f622b94ff8c3049ebbdb' 
  AND token = 'IX/8ekM9Mih8jyFJ39qeIGOysAcmDKNKrG813C0HNUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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