Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e2b1063d92128386c5a032fad7539d987080617e4d4519b7cbc06c81232e6bc' 
  AND token = 'GvQCA7cp/fEhRGqcNr1AB4zRmRTRneLuKMyMsCq4+U0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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