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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d07eeac5e1220f4c17a744ce7353f0ea3a9a079e2a781998bab8ee8461c06dc' 
  AND token = '+6rKmuJrekISlHhafEdlfGo0jAGgRwmsNNOd7GtvUi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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