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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ec3c269609928ebaf806d57ea7dc46870ea54decd9463fe0c06db3a955bb56e' 
  AND token = 'Q9smuHPkazjYrhpESPY1YD7G0vNllB12ibUJNivKqPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00162

JSON explain

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