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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9d525ed7d5215c3eeec83ddd04c4b6ec5658249ba8b74aea3c6291720d226dc' 
  AND token = 'Ioe9Z5VaGVHacxHT5w0IlDTwmodAOiYFX0dkHWilCcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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