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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '053a7f05f84ed488e299e21ff417efd3602c40a7a8775ebff8cf97d0c150a450' 
  AND token = 'GCMf3hsfaNF73czsotuUBWzkH6RjFPr0sI/lhDuWPiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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