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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '236e6c398579265bae7d1a91110a714ec1e0c483844e5bec851034da5e5d6a4b' 
  AND token = 'x/PoMIXKygSXkD6Q+S8GCabYOVRtkbG75VTpO26seRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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