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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a067c137708d1228ed0195ec43a226b6c2d77c8a2c203e4c7d3bd27e533390d' 
  AND token = 'ITfGFiXK6zqQSaxWfp4hAa5k3xtsIKkiN24K370RGQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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