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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0290d9bce101c86e8fdeb55493cd0f15981f1d85a0d0ae7cba68d6b0e82e6c82' 
  AND token = 'l/G+D7tBi7gw38kZSlY32jlHDZrPzYINIRwLC8wPeZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00232

JSON explain

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