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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '415dbf4d1ce7ec14a4873e3ec685da2b33ea1bf410888e4129e6cdf9bb808ae4' 
  AND token = 'hzwxUEb119oHzvoG0Sej6jOYQpkj4ucIbs0hE7PLMqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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