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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7bb93dcae197182286dc68dcee095a10ae327b4a7e14fe383507d03f31105e95' 
  AND token = 'Hp8cYt/pGpyTyWpY6AqI2wdjJSSin8b2N0sHHtZrSms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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