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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea08a9ca710090f04fad6327a20f8b2564de6a8fc4104ef339877d45a7963b31' 
  AND token = 'EAHaIBpC0HQ9PTrND1t1KdEkhrp1dFR1Y4yzl7twuhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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