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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9b918ede88644bcfbdaa2a87bd3a8298373ab47f99a17ed73c411dc3fe7d5de' 
  AND token = 'ALhAPZ3liOiIXkv7hSukfaQ1nSdcyHpyORQm5Gsk3QE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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