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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0a665c24bb7c568ef22d1b6128dafc91b0362c5087ab9a4ab6bee81d1102e989' 
  AND token = 'j5AUM33B1p1eeAj/9IRIxB4/aAHEM3jMzxW+LG6IyHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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