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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd9fab5deabf81bdbb0927b8ae2a2b19f103a09a18849ac719d91244e2314885' 
  AND token = '97AZ2MeHBXC9IohSkl6ZV/ea5e6dP/rGsNjzER89rqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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