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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fbbacda4cf0510bb660378f13f8f6ca98aa16602a01fdc030b827e4581e6de4a' 
  AND token = '3dNx2AT7Kh2WlykWA/oHhB0P7MFN7m3oIfWMRN86Qck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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