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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13a32dd0c2c6dc2c973e32ee47d256fc8dfb29187bba477d48e014cc2ba00854' 
  AND token = 'z48iB0XeKCinQd1VMVX/M4eEO67t8BhyFGVhoYVoPBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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