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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '505f15a34b27b5a4722f972f1e4760fc2ac221158c4cb1d864dc19364aef0dd1' 
  AND token = 'keGfYJ8MR9SI4LOCh3XRKUe8seAFPZMzV9C3OzaM70c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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