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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9aa38fccadb6d7dc35d829c99d2c38425559c6ca1482061a80118369dd79eea0' 
  AND token = 'qNGXsglz7dC4Ah7fI2vCwOOazT7KhJs2WMEnX7jad+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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