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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d1d050caf0c4ca21c556116e0bf972390aa4536e0e5378e6604c72cc213179b' 
  AND token = 'i1p+O6Cu5WYGXmzToekK5WG0ZTaC1xGBVdlC21dYHpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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