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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d8ee13cb133d46cdd7368dbe6e2633ed8339c4bf012cc538a25bca95e3f8eb8' 
  AND token = '44xZBztA+p63bs/dFyMtm8L+pRZX/we+qk6S9SKqNY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00118

JSON explain

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