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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '632c0490530c8e6d5d1b6ba0d8c9b5368d6111458d3190386c8fc890dfdb8b6b' 
  AND token = 'dCV2YfWDFo12wZEi98W6vJBrOqO28oSyf2/jhZC2EJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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