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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d3383f1f1a4c6cb6e5e3f35b4834a551feb63c2a842c2e72db290507fe2a1d7' 
  AND token = 'OgXM3+g7FPgeP4sUttdtaj6F+uVisTAGye3reVBw+4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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