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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01da89c67ff40fee3c6090bbddbea88e53f87fab1ad66dcf88f58bda01e30f9d' 
  AND token = 'NsZ64yVPAhPtJV1puvlxsvffLs0iR6+XPhIGzYsh6LM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}