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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '145d9df4e3fac51932b57c5c6cf4670d4af23670d16f14c39f9a8afbb732bcc6' 
  AND token = 'pbAZUg06AzyJrLLCRhmGLIQj8D/cN20VpgfPhGcGWpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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