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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5486a2d48c154a93553309f16c2a542742ff47534b6349fa5e15747dc62d1253' 
  AND token = 'gLkvmf1qPK8SRkrwxGdkiyVRl2jHdS1PY7fpsH4aIVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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