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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '441a557a8163ecdbbc7135e833cae5cea93fcf7f34392d23f97ed8170b201000' 
  AND token = 'um7XqN/7eBbKdv+8bVHT8oO3Kfvolw3T/6w3LPSF8lA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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