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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca5fa44777c16cfb22213287e1a5385efde2bc42770db611e4620e0a0079b1d6' 
  AND token = 'TV9kcH5wB+32e42AzjAYeSsR2XpxPYoZIOm4EwbOhAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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