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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8bba7cc6f28ad2c24db0854f47d27bec9811f047f5fe9b0b4730c811ea967875' 
  AND token = 'LIh99gyVBDMfCFiV3NcY24Ctk0GJ5TIRqWcA4lokEKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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