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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8af3c4c3b26d194b4c2e077a9a19faf32b799b0f5dc010258e40c0d1f528df8' 
  AND token = '2PA46ZG/yr1B1r1mgk1mHkEbsyACNO0u4ZRqhVawyc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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