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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05e5a7cf1d19a25b7b6954ed69b5e8fd4e52b8eddd9cd8463d7fb14e47ad1aaa' 
  AND token = 'EoqZOv0ISX6EAOiLMD6ei5e9ujLMFfmmBBZVPhHUS/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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