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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07a4d0bafd8701d6c3fbd5e037053ac3a3fe7120a42097ab7d28ea4f93e42501' 
  AND token = 'bw0w+HIi19Ca3hPq/CMygEtZgt5JpXQ2CMfhO0Amgic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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